Differential Scanning Calorimetric Study of the Kaolinite: N-Methylformamide Intercalate

J. M. Adams
Edward Davies Chemical Laboratories, University College of Wales, Aberystwyth, Dyfed, SY23 1NE, Wales

Abstract: The thermal decomposition of the kaolinite: N-methylformamide intercalate [Al2Si2O5(OH)4·HCONHCH3] has been studied by differential scanning calorimetry (DSC). The decomposition starts at 355 K, finishes at 450 K and follows Avrami-Erofeev kinetics for α = 0.04–0.96. ΔH for the loss of organic is 19 ± 2 kJ mol−1; the activation energy for the reaction is 30 ± 3 kJ mol−1.

Key Words: Intercalate • Kaolinite • Methylformamide

Clays and Clay Minerals; April 1978 v. 26; no. 2; p. 169-172; DOI: 10.1346/CCMN.1978.0260213
© 1978, The Clay Minerals Society
Clay Minerals Society (www.clays.org)